/**
 * 
 */
/**
 * this Package is the Logic Layer
 * This package is the core of the program. it contains:
 * 1. Database class:
 *     make (and store the data to make) the connection to the database
 *    and contain functions that perform queries and manipulations over the database
 *    according to user request.
 *    
 * 2. Sys class:
 *    this class designed as controller class. meaning: all the user communication with
 *    the database thru the GUI windows (user request from the database) and all the
 *    communication from the database to the user (send response to user query to the GUI)
 *    is thru the "Sys" middleware. 
 *
 */
package Control;